<template>
	<view>
		<!--自定义搜索组件-->
		<my-search @click="gotosearch"></my-search>
		<view class="scroll-view-container">
			<!--左侧的滑动区域-->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
			<block v-for="(item,i) in cateList" :key="i">
				<view :class="['left-scroll-view-item',i===active ? 'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
			</block>
				
			</scroll-view>
			<!--右侧的滑动区域-->
			<scroll-view class="right-scroll-view" scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!--二级分类标题-->
					<view class="cate-lv2-title">
						/ {{item2.cat_name}} /
					</view>
					<!--三级分类标题-->
					<view class="cate-lv3-list">
						<!--三级分类item项-->
						<view class="cate-lv3-item"v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodList(item3)">
							<!--三级分类图片-->
							<image :src="item3.cat_icon" ></image>
							<!--三级分类文本-->
							<text>{{item3.cat_name}}</text>
							
						</view>
					</view>
				</view> 
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from'@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可用的高度
				wh:0,
				cateList:[],
				//点击激活项目
				active:0,
				//二级分类的列表
				cateLevel2:[],
				scrollTop:0
				
			};
		},
		onLoad(){
			//获取设备屏幕高度
			const sysInfo=uni.getSystemInfoSync()
			this.wh=sysInfo.windowHeight-50
			this.getCateList()
		},
		methods:{
			//获取分页列表数据
			async getCateList(){
				const {data:res}=await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status!==200){
					return uni.$showMsg()
				}
				this.cateList=res.message
				//为二级分类赋值
				this.cateLevel2=res.message[0].children
			},
			activeChanged(i){
				this.active=i
				//重新为二级分类赋值
				this.cateLevel2=this.cateList[i].children
				this.scrollTop=this.scrollTop===0?1:0
			},
			gotoGoodList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
				})
			},
			gotosearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
				
			}
			
		}
	}

</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	.left-scroll-view{
		width: 120px;
		.left-scroll-view-item{
			background-color: #F7F7F7;
			line-height: 60rpx;
			text-align:center;
			font-size: 12px;
			
			
			&.active{
				background-color: #F7F7F7;
				position:relative;
				&::before{
					content: '';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #c00000;
					position: absolute;
					top:50%;
					left:0;
					transform:translateY(-50%)

				}
			}
		}
	}
	.right-scroll-view{
		background-color: white;
	}
	.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
		
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;//自动换行
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;//图片文字纵向排布
			justify-content: center;
			align-items: center;
			margin-bottom: 10;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
			
		}
		
	}
	
}

</style>
